[mythtv] [mythtv-commits] Ticket #6569: ac3 level is low for 5.1 source

[Mark Spieth]

>   I'm closing this one for now as you seem to be in touch with the audio
>   guys regarding the current (and upcoming) audio changes  that will affect
>   or possibly render unnecessary this ticket.  If this issue is uncorrected
>   by those changes, please do feel free to reopen this ticket at any time
>   with an update to your patch.  Closing this as "fixed" as there's no real
>   appropriate resolution otherwise.
>
>    
robert,

my patch is still relevant. audio levels match with this patch. it is 
however in libavcodec of course and AFAICT wont be included in ffmpeg as 
they didnt like the hack and I didnt like the compromises they would 
agree to (compressed audio mode on 2ch mode, reducing quality). putting 
it in avf would also reduce quality/dynamic range losing 2 bits.

however auto switching between 2 and 6 ch mode in ac3 is currently 
broken. It currently only goes from 6 to 2 ch mode and never goes back 
to 6 ch mode.

I do have a patch for this but it is a bit nasty in its swapping effects 
and requires some audio changes so Ill hold off until the new audio 
stuff is in place.

It may be that the patch I have is better than nothing for the interim 
though. your call.

jya, we need a reconfigure mode that allows seemless upmix/source 
channel changes without killing audio to swap between 2-6ch upmix and 
native 6ch mode. should be easy.

cheers
mark